Patents by Inventor Sang Yuen Yuen

Sang Yuen Yuen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Energy management system and control method using the same, for determining an operation mode of a high voltage direct current system
    Patent number: 8169106
    Abstract: The present disclosure relates to an energy management system (EMS) and a method using the same, wherein the EMS comprises, a communication module receiving a channel information of a high voltage direct current (HVDC) system via a network; a circuit realization unit obtaining a connection information among constituent elements symbolizing the constituent elements among each node in electrical symbols by sequentially following pre-set nodes of the HVDC system, and forming the HVDC system by connecting the symbolized constituent elements using electrical lines by using the channel information of HVDC system received by the communication module; a system analyzing unit analyzing an operation mode of the HVDC system through the connection information among the constituent elements of the HVDC system obtained by the circuit realization unit; and a controller managing and controlling the HVDC system by giving an energy management command in response to the operation mode analyzed by the system analyzing unit.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: May 1, 2012
    Assignee: LS Industrial Systems Co., Ltd.
    Inventors: Uk Hwa Lee, Sang Yuen Yuen, Yoon-Sung Cho
  • ENERGY MANAGEMENT SYSTEM AND CONTROL METHOD USING THE SAME
    Publication number: 20090196077
    Abstract: The present disclosure relates to an energy management system (EMS) and a method using the same, wherein the EMS comprises, a communication module receiving a channel information of a high voltage direct current (HVDC) system via a network; a circuit realization unit obtaining a connection information among constituent elements symbolizing the constituent elements among each node in electrical symbols by sequentially following pre-set nodes of the HVDC system, and forming the HVDC system by connecting the symbolized constituent elements using electrical lines by using the channel information of HVDC system received by the communication module; a system analyzing unit analyzing an operation mode of the HVDC system through the connection information among the constituent elements of the HVDC system obtained by the circuit realization unit; and a controller managing and controlling the HVDC system by giving an energy management command in response to the operation mode analyzed by the system analyzing unit.
    Type: Application
    Filed: January 30, 2009
    Publication date: August 6, 2009
    Inventors: Uk Hwa Lee, Sang Yuen Yuen, Yoon-Sung Cho